diff --git a/crypto/skf/skf.h b/crypto/skf/skf.h
index 0925d89a..bba36fd5 100644
--- a/crypto/skf/skf.h
+++ b/crypto/skf/skf.h
@@ -99,6 +99,28 @@ typedef UINT32			DWORD;
 typedef UINT32			FLAGS;
 typedef CHAR *			LPSTR;
 typedef void *			HANDLE;
+#else
+#ifndef _WINDEF_H
+typedef signed char		INT8;
+typedef signed short		INT16;
+typedef signed int		INT32;
+typedef unsigned char		UINT8;
+typedef unsigned short		UINT16;
+typedef unsigned int		UINT32;
+typedef long			BOOL;
+typedef UINT8			BYTE;
+typedef UINT8			CHAR;
+typedef INT16			SHORT;
+typedef UINT16			USHORT;
+typedef INT32			LONG;
+typedef UINT32			ULONG;
+typedef UINT32			UINT;
+typedef UINT16			WORD;
+typedef UINT32			DWORD;
+typedef UINT32			FLAGS;
+typedef CHAR *			LPSTR;
+typedef void *			HANDLE;
+#endif
 #endif
 
 typedef HANDLE DEVHANDLE;